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frontal selection positivity

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https://www.readbyqxmd.com/read/27920723/sex-dependent-anti-stress-effect-of-an-%C3%AE-5-subunit-containing-gabaa-receptor-positive-allosteric-modulator
#1
Sean C Piantadosi, Beverly J French, Michael M Poe, Tamara Timić, Bojan D Marković, Mohan Pabba, Marianne L Seney, Hyunjung Oh, Beverley A Orser, Miroslav M Savić, James M Cook, Etienne Sibille
Rationale: Current first-line treatments for stress-related disorders such as major depressive disorder (MDD) act on monoaminergic systems and take weeks to achieve a therapeutic effect with poor response and low remission rates. Recent research has implicated the GABAergic system in the pathophysiology of depression, including deficits in interneurons targeting the dendritic compartment of cortical pyramidal cells. Objectives: The present study evaluates whether SH-053-2'F-R-CH3 (denoted "α5-PAM"), a positive allosteric modulator selective for α5-subunit containing GABAA receptors found predominantly on cortical pyramidal cell dendrites, has anti-stress effects...
2016: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/27890705/selective-rehearsal-is-affected-by-the-emotionality-of-the-encoding-context-in-item-method-directed-forgetting-an-event-related-potential-study
#2
Tzu-Ling Liu, Nai-Feng Chen, Shih-Kuen Cheng
Emotional items are often remembered more clearly than neutral items. However, whether stimuli embedded in an emotional context are more resistant to directed forgetting than those presented in a neutral context remains unclear. This question was tested by recording event-related potentials (ERPs) in an item-method directed forgetting paradigm involving neutral words that were embedded in neutral or negative contexts. During the study phase, participants were asked to associate a neutral word with a negative or neutral picture...
November 24, 2016: Biological Psychology
https://www.readbyqxmd.com/read/27881949/neural-mechanisms-of-the-transformation-from-objective-value-to-subjective-utility-converting-from-count-to-worth
#3
Yoanna A Kurnianingsih, O'Dhaniel A Mullette-Gillman
When deciding, we aim to choose the "best" possible outcome. This is not just selection of the option that is the most numerous or physically largest, as options are translated from objective value (count) to subjective value (worth or utility). We localized the neural instantiation of the value-to-utility transformation to the dorsal anterior midcingulate cortex (daMCC), with independent replication. The daMCC encodes the context-specific information necessary to convert from count to worth. This encoding is not simply a representation of utility or preference, but the interaction of the two...
2016: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/27871700/laypeople-s-perceptions-of-frontal-smile-esthetics-a-systematic-review
#4
Simone Parrini, Gabriele Rossini, Tommaso Castroflorio, Arturo Fortini, Andrea Deregibus, Cesare Debernardi
INTRODUCTION: The emphasis on dental esthetics has increased in recent years. There are, however, differences in esthetic perceptions among professional and lay groups. The aim of this comprehensive review was to update previous reviews and answer the following research question: Can lay thresholds for acceptance of smile esthetic anomalies be defined? METHODS: A systematic search in the medical literature (PubMed, PMC, NLM, Embase, Cochrane Central Register of Controlled Clinical trials, Web of Knowledge, Scopus, Google Scholar, and LILACs) was performed to identify all peer-reviewed articles reporting data regarding evaluations of laypeople's perceptions of dental esthetic factors...
November 2016: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/27865969/age-related-alterations-in-functional-connectivity-patterns-during-working-memory-encoding-of-emotional-items
#5
Maryam Ziaei, Alireza Salami, Jonas Persson
Previous findings indicate age-related differences in frontal-amygdala connectivity during emotional processing. However, direct evidence for age differences in brain functional activation and connectivity during emotional processing and concomitant behavioral implications is lacking. In the present study, we examined the impact of aging on the neural signature of selective attention to emotional information during working memory (WM) encoding. Participants completed an emotional WM task in which they were asked to attend to emotional targets and ignore irrelevant distractors...
November 16, 2016: Neuropsychologia
https://www.readbyqxmd.com/read/27848003/positional-plagiocephaly-following-ventriculoperitoneal-shunting-in-neonates-and-infancy-how-serious-is-it
#6
Stuart A G Roberts, Joseph D Symonds, Reema Chawla, Emma Toman, Jonathan Bishop, Guirish A Solanki
PURPOSE: We test the hypothesis that ventriculoperitoneal (VP) shunt insertion significantly increases contralateral positional plagiocephaly. METHODS: We reviewed 339 children who had a VP shunt inserted at Birmingham Children's Hospital between 2006 and 2013, noting laterality of shunt insertion and frontal or occipital position. We ascertained the presence of post-operative positional plagiocephaly using the cranial vault asymmetry index. Multinomial logistic regression modelling was used to examine relationships between plagiocephaly, shunt position, gender and age...
November 15, 2016: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/27846290/altered-effective-connectivity-of-the-primary-motor-cortex-in-stroke-a-resting-state-fmri-study-with-granger-causality-analysis
#7
Zhiyong Zhao, Xiangmin Wang, Mingxia Fan, Dazhi Yin, Limin Sun, Jie Jia, Chaozheng Tang, Xiaohui Zheng, Yuwei Jiang, Jie Wu, Jiayu Gong
The primary motor cortex (M1) is often abnormally recruited in stroke patients with motor disabilities. However, little is known about the alterations in the causal connectivity of M1 following stroke. The purpose of the present study was to investigate whether the effective connectivity of the ipsilesional M1 is disturbed in stroke patients who show different outcomes in hand motor function. 23 patients with left-hemisphere subcortical stroke were selected and divided into two subgroups: partially paralyzed hands (PPH) and completely paralyzed hands (CPH)...
2016: PloS One
https://www.readbyqxmd.com/read/27833549/impaired-white-matter-connections-of-the-limbic-system-networks-associated-with-impaired-emotional-memory-in-alzheimer-s-disease
#8
Xiaoshu Li, Haibao Wang, Yanghua Tian, Shanshan Zhou, Xiaohu Li, Kai Wang, Yongqiang Yu
Background: Discrepancies persist regarding retainment of emotional enhancement of memory (EEM) in mild cognitive impairment (MCI) and early Alzheimer's disease (AD) patients.In addition, the neural mechanisms are still poorly understood, little is known about emotional memory related changes in white matter (WM). Objective: To observe whether EEM is absent in amnestic MCI (aMCI) and AD patients, and to investigate if emotional memory is associated with WM connections and gray matters (GM) of the limbic system networks...
2016: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/27832952/cross-slope-and-level-walking-strategies-during-swing-in-individuals-with-a-lower-limb-amputation
#9
Coralie Villa, Isabelle Loiret, Karine Langlois, Xavier Bonnet, François Lavaste, Pascale Fodé, Hélène Pillet
OBJECTIVE: The aim of this study was to quantitatively analyze prosthetic limb swing phase gait strategies used to adapt to cross-slopes compared to level walking. DESIGN: Cross-sectional study SETTING: Gait laboratory PARTICIPANTS: A volunteer sample of seventeen individuals with a transfemoral amputation, fifteen individuals with a transtibial amputation and seventeen able-bodied subjects. INTERVENTIONS: Participants walked on level and 6° (10%) cross slope surfaces at a self-selected walking speed...
November 7, 2016: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/27807161/bottom-up-versus-top-down-induction-of-sleep-by-zolpidem-acting-on-histaminergic-and-neocortex-neurons
#10
David S Uygun, Zhiwen Ye, Anna Y Zecharia, Edward C Harding, Xiao Yu, Raquel Yustos, Alexei L Vyssotski, Stephen G Brickley, Nicholas P Franks, William Wisden
: Zolpidem, a GABAA receptor-positive modulator, is the gold-standard drug for treating insomnia. Zolpidem prolongs IPSCs to decrease sleep latency and increase sleep time, effects that depend on α2 and/or α3 subunit-containing receptors. Compared with natural NREM sleep, zolpidem also decreases the EEG power, an effect that depends on α1 subunit-containing receptors, and which may make zolpidem-induced sleep less optimal. In this paper, we investigate whether zolpidem needs to potentiate only particular GABAergic pathways to induce sleep without reducing EEG power...
November 2, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27797812/astrogliopathy-predominates-the-earliest-stage-of-corticobasal-degeneration-pathology
#11
Helen Ling, Gabor G Kovacs, Jean Paul G Vonsattel, Karen Davey, Kin Y Mok, John Hardy, Huw R Morris, Thomas T Warner, Janice L Holton, Tamas Revesz
SEE KOBYLECKI AND MANN DOI101093/AWW267 FOR A SCIENTIFIC COMMENTARY ON THIS ARTICLE: Animal models have shown that tau seeding and propagation are strain- and neural network-specific. The study of preclinical cases is valuable to gain insights into early pathological features of corticobasal degeneration and its progression. Three preclinical corticobasal degeneration cases and six age-matched end-stage corticobasal degeneration cases were included in this study. Tau immunohistochemistry performed in 20 brain regions and quantitative assessment of regional tau load using image analysis were performed...
December 2016: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/27756833/the-frontal-cortex-as-a-network-hub-controlling-mood-and-cognition-probing-its-neurochemical-substrates-for-improved-therapy-of-psychiatric-and-neurological-disorders
#12
Mark J Millan, Jean-Michel Rivet, Alain Gobert
The highly-interconnected and neurochemically-rich frontal cortex plays a crucial role in the regulation of mood and cognition, domains disrupted in depression and other central nervous system disorders, and it is an important site of action for their therapeutic control. For improving our understanding of the function and dysfunction of the frontal cortex, and for identifying improved treatments, quantification of extracellular pools of neuromodulators by microdialysis in freely-moving rodents has proven indispensable...
October 17, 2016: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/27755991/risperidone-and-escitalopram-co-administration-a-potential-treatment-of-schizophrenia-symptoms-with-less-side-effects
#13
Katarzyna Kamińska, Karolina Noworyta-Sokołowska, Alexandra Jurczak, Anna Górska, Zofia Rogóż, Krystyna Gołembiowska
BACKGROUND: Schizophrenia is a psychiatric disorder characterized by positive and negative symptoms often accompanied by depression and cognitive deficits. Positive symptoms, like delusions and hallucinations are caused by an excess of dopamine (DA) signaling and are treated with the second generation antipsychotic drugs. Negative symptoms of schizophrenia are represented by social withdrawal, apathy and blunted emotional response. It was demonstrated that co-administration of risperidone and selective serotonin reuptake inhibitors alleviated depressive symptoms and cognitive dysfunction in animal models of schizophrenia...
September 11, 2016: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/27751958/neural-control-of-arm-movements-reveals-a-tendency-to-use-gravity-to-simplify-joint-coordination-rather-than-to-decrease-muscle-effort
#14
Wanyue Wang, Natalia Dounskaia
How gravity influences neural control of arm movements remains under debate. We tested three alternative interpretations suggested by previous research: (1) that muscular control includes two components, tonic which compensates for gravity and phasic which produces the movement; (2) that there is a tendency to exploit gravity to reduce muscle effort; and (3) that there is a tendency to use a trailing pattern of joint control during which either the shoulder or elbow is rotated actively and the other joint rotates predominantly passively, and to exploit gravity for control of the passively rotated joint...
December 17, 2016: Neuroscience
https://www.readbyqxmd.com/read/27741467/reconfiguration-of-hub-level-community-structure-in-depressions-a-follow-up-study-via-diffusion-tensor-imaging
#15
Jiaolong Qin, Haiyan Liu, Maobin Wei, Ke Zhao, Jianhuai Chen, Jingyu Zhu, Xiangyu Shen, Rui Yan, Zhijian Yao, Qing Lu
BACKGROUND: The role of abnormal communications among large-scale brain networks have been given increasing attentions in the pathophysiology of major depressive disorder (MDD). However, few studies have investigated the effect of antidepressant medication treatment on the information communication of structural brain networks, especially converged from the individual analysis. METHODS: Nineteen unipolar MDD patients completed two diffusion tensor imaging (DTI) scans before and after 8-week treatment with selective serotonin reuptake inhibitor...
January 1, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/27699796/electrophysiological-revelations-of-trial-history-effects-in-a-color-oddball-search-task
#16
Eunsam Shin, Sang Chul Chong
In visual oddball search tasks, viewing a no-target scene (i.e., no-target selection trial) leads to the facilitation or delay of the search time for a target in a subsequent trial. Presumably, this selection failure leads to biasing attentional set and prioritizing stimulus features unseen in the no-target scene. We observed attention-related ERP components and tracked the course of attentional biasing as a function of trial history. Participants were instructed to identify color oddballs (i.e., targets) shown in varied trial sequences...
December 2016: Psychophysiology
https://www.readbyqxmd.com/read/27699480/regional-cerebellar-volumetric-correlates-of-manual-motor-and-cognitive-function
#17
Vincent Koppelmans, Yoo Young Hoogendam, Sarah Hirsiger, Susan Mérillat, Lutz Jäncke, Rachael D Seidler
Cerebellar volume declines with aging. Few studies have investigated age differences in regional cerebellar volume (RCV) and their association with motor and cognitive function. In 213 healthy older adults, we investigated the association of age with motor skills, cognition and RCV. Subsequently, we studied the association of RCV with motor skills and cognition. RCVs were derived from T1-weighted MRI scans using the automated SUIT segmentation method and clustered using principal component analysis (PCA). Motor skill (manual dexterity, tapping speed, bimanual visuomotor coordination, grip force) and cognition (mental rotation, verbal memory, inhibition, mental flexibility) were assessed...
October 3, 2016: Brain Structure & Function
https://www.readbyqxmd.com/read/27693229/the-research-domain-criteria-framework-the-case-for-anterior-cingulate-cortex
#18
REVIEW
Clay B Holroyd, Akina Umemoto
The United States National Institute of Mental Health has recently promoted the Research Domain Criteria framework, which emphasizes the study of neurocognitive constructs that cut across different disorders. These constructs are said to express dimensionally across the population, giving rise to psychopathologies only in the extreme cases where that expression is maladaptive. Inspired by the RDoC framework, we propose that recent insights into the function of anterior cingulate cortex (ACC), a brain area said to be responsible for selecting and motivating extended behaviors, may elucidate the etiology of a diverse array of mental disorders...
December 2016: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/27685765/relationship-between-widening-and-position-of-the-tunnels-and-clinical-results-of-anterior-cruciate-ligament-reconstruction-to-knee-osteoarthritis-30-patients-at-a-minimum-follow-up-of-10-years
#19
Juan Diego Ayala-Mejias, Benjamin Garcia-Gonzalez, Luis Alcocer-Perez-España, Jorge Hugo Villafañe, Pedro Berjano
To evaluate the relationship between tunnel position and widening and long-term clinical results in anterior cruciate ligament (ACL) reconstruction, a retrospective cohort of 30 patients undergoing ACL reconstruction with double semitendinous plus double gracilis (SAC technique) with longer than 10-year follow-up was selected. CT scans in the first 3 months and at final follow-up was evaluated. Position, angle, and widening of tunnels including Nebelung criteria were recorded in all CT scans. Physical, KT-1000, and clinical evaluation were performed at final follow-up...
September 29, 2016: Journal of Knee Surgery
https://www.readbyqxmd.com/read/27668196/diagnostic-methods-for-assessing-maxillary-skeletal-and-dental-transverse-deficiencies-a-systematic-review
#20
REVIEW
Dena Sawchuk, Kris Currie, Manuel Lagravere Vich, Juan Martin Palomo, Carlos Flores-Mir
OBJECTIVE: To evaluate the accuracy and reliability of the diagnostic tools available for assessing maxillary transverse deficiencies. METHODS: An electronic search of three databases was performed from their date of establishment to April 2015, with manual searching of reference lists of relevant articles. Articles were considered for inclusion if they reported the accuracy or reliability of a diagnostic method or evaluation technique for maxillary transverse dimensions in mixed or permanent dentitions...
September 2016: Korean Journal of Orthodontics
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